Different Language of installation package

The ADNM is running fine. It is running on a 2003server (English version). However when I am creating a new Installation package the "Wizard"is in Dutch (the server is located in the Netherlands). The Avast antivirus on the client is also in Dutch. We would like to have this all in English. I know we can set the language of the client afterwards to English but this would mean we have to visit several hundreds of workstations. I tried all kinds of language setting in the ADNM but the creation of the Installation package and the client are still in the Dutch language. How can I change this ? Are there any language settings in the hosts system (2003 server of XP) which have any kind of influance?

Any help on this is welcome.

Can you modify the list of installed language modules during the creation of the installation package?
I’d say if you install English modules only, the client will be in English.